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Or, rather, a first listen. The audio for this Globe-provided clip is of Lea Salonga (the Tony-winning actress who plays Kei Kimura in the show) and Michael K. Lee (the Broadway-seasoned actor who plays Frankie Suzuki) performing a duet on the tune "The Mountain's Heart."

The video, though, does not document a performance of the song; it consists of still images from rehearsal, featuring Salonga and Lee as well as fellow cast members Telly Leung, Allie Trimm and the estimable George Takei.

"Allegiance" is the long-in-the-works show whose story backdrop is the internment of Japanese-Americans during World War II. It runs at the Globe Sept. 7 to Oct. 21.